adding command looping and bypass command

Makefile

@@ -0,0 +1,16 @@
+LIBRARIES = -lreadline
+RELEASE_ARGS = -DRELEASEBUILD
+SOURCES = ./msh.c
+OUTPUT_DIR = ./bin
+OUTPUT_BIN = ${OUTPUT_DIR}/PROG
+OUTPUT = -o ${OUTPUT_BIN}
+
+build:
+	RUSTFLAGS='-C target-feature=+crt-static' cargo build	
+
+debug:
+	cargo build
+
+install:
+	mv ${OUTPUT_BIN:PROG=mash} /usr/sbin/blah
+

main.rs

@@ -1,7 +1,8 @@
+use std::io::Write;
 use std::process::{Command, Output};
 use std::io::Result as IoResult;
-use inquire::{Text, validator::{Validation}};
-use inquire::{error::InquireError, Select};
+use inquire::{Text, validator::Validation};
+use inquire::Select;
 use inquire::ui::{RenderConfig, Styled};
 use regex::Regex;
 
@@ -25,15 +26,22 @@ fn execute_command(command: &str) -> IoResult<String> {
     }
 }
 
+fn prompt(name:&str) -> String {
+    let mut line = String::new();
+    print!("{}", name);
+    std::io::stdout().flush().unwrap();
+    std::io::stdin().read_line(&mut line).expect("Error: Could not read a line");
+
+    return line.trim().to_string()
+}
+
 fn main() {
-    let prompt_gen_command = "echo -n \"[${USER}@${HOSTNAME} ${PWD##*/}]$\"";
-    let prompt_gen = match execute_command(&prompt_gen_command) {
-        Ok(output) => output,
-        Err(_) => return
-    };
+    let prompt_gen_command = "echo -n \"r-[${USER}@${HOSTNAME} ${PWD##*/}]$ \"";
 
     let mut empty_render_config: RenderConfig = RenderConfig::default();
     empty_render_config = empty_render_config.with_prompt_prefix(Styled::new(""));
+    empty_render_config = empty_render_config.with_answered_prompt_prefix(Styled::new(""));
+    empty_render_config = empty_render_config.with_canceled_prompt_indicator(Styled::new(""));
 
     let re = Regex::new(r"CHG[0-9]{6}$").unwrap();
     let options: Vec<&str> = vec!["File change", "Package Update", "Package Removal",
@@ -47,36 +55,57 @@ fn main() {
         Ok(Validation::Invalid("Invalid change request (e.g: CHGXXXXXX)".into()))
     };
 
-    let validator = |input: &str| if input.chars().count() > 140 {
-        Ok(Validation::Invalid("You're only allowed 140 characters.".into()))
-    } else if input.chars().count() == 0 {
-        Ok(Validation::Invalid("".into()))
-    } else {
-        Ok(Validation::Valid)
-    };
-
-    let prompt_command = match Text::new(&prompt_gen)
-        .with_validator(validator)
-        .with_render_config(empty_render_config)
-        .prompt() {
-            Ok(input) => input,
-            Err(_) => {
-                eprintln!("Failed to get system input.");
-                return;
-            }
+    let mut bypass_change = false;
+    loop {
+        let prompt_command = match execute_command(&prompt_gen_command) {
+            Ok(output) => {
+                let prompt_output = prompt(&output);
+                if prompt_output.chars().count() == 0 {
+                    continue;
+                } else if prompt_output.starts_with("runme ") || prompt_output == "runme" {
+                    bypass_change = true;
+                    if prompt_output.len() > 6 {
+                        match execute_command(prompt_output.split_at(6).1) {
+                            Ok(output) => print!("{}", output),
+                            Err(e) => eprintln!("Command failed: {}", e),
+                        }
+                    }
+                    continue;
+                } else {
+                    prompt_output
+                }
+            },
+            Err(_) => return
         };
 
-    let _ = Text::new("(e.g. CHGXXXXXX) Enter change request: ").with_validator(change_validator).prompt();
+        if !bypass_change {
+            let change_request = match Text::new("(e.g. CHGXXXXXX) Enter change request: ")
+                .with_validator(change_validator.clone())
+                .prompt() {
+                    Ok(input) => input,
+                    Err(_) => return,
+                };
+            println!("Change request validated: {}", change_request);
 
-    let ans: Result<&str, InquireError> = Select::new("Change Type?", options).prompt();
+            let ans = Select::new("Change Type?", options.clone())
+                .with_render_config(empty_render_config.clone())
+                .prompt();
 
-    match ans {
-        Ok(_) => {
-            match execute_command(&prompt_command) {
-               Ok(output) => print!("{}", output),
-                Err(e) => eprintln!("Command failed: {}", e),
+            match ans {
+                Ok(selected_option) => {
+                    println!("Selected option: {}", selected_option);
+                    match execute_command(&prompt_command) {
+                        Ok(output) => print!("{}", output),
+                        Err(e) => eprintln!("Command failed: {}", e),
+                    }
+                }
+                Err(_) => println!("not running command..."),
             }
-        },
-        Err(_) => println!("not running command..."),
+        } else {
+            match execute_command(&prompt_command) {
+                Ok(output) => print!("{}", output),
+                Err(e) => eprintln!("Command failed: {}", e)
+            }
+        }
     }
 }